How severe is CVE-2025-62521?

CVE-2025-62521 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-62521 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-62521?

CVE-2025-62521 affects Churchcrm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-62521?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-62521 have an EU (EUVD) identifier?

Yes. CVE-2025-62521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203917.

When was CVE-2025-62521 published?

CVE-2025-62521 was published on 2025-12-17 and last updated on 2026-06-17.

CVE-2025-62521

CVE-2025-62521 is a critical-severity vulnerability in Churchcrm with a CVSS 3.x base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 3.x base score 10.0)
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-203917
Weakness: CWE-94
Affected product: Churchcrm
Published: 2025-12-17
Last modified: 2026-06-17

Description

ChurchCRM is an open-source church management system. Prior to version 5.21.0, a pre-authentication remote code execution vulnerability in ChurchCRM's setup wizard allows unauthenticated attackers to inject arbitrary PHP code during the initial installation process, leading to complete server compromise. The vulnerability exists in `setup/routes/setup.php` where user input from the setup form is directly concatenated into a PHP configuration template without any validation or sanitization. Any parameter in the setup form can be used to inject PHP code that gets written to `Include/Config.php`, which is then executed on every page load. This is more severe than typical authenticated RCE vulnerabilities because it requires no credentials and affects the installation process that administrators must complete. Version 5.21.0 patches the issue.

Frequently asked questions

What is CVE-2025-62521?: ChurchCRM is an open-source church management system. Prior to version 5.21.0, a pre-authentication remote code execution vulnerability in ChurchCRM's setup wizard allows unauthenticated attackers to inject arbitrary PHP code during the initial installation process, leading to complete server compromise. The vulnerability exists in `setup/routes/setup.php` where user input from the setup form is directly concatenated into a PHP configuration template without any validation or sanitization. Any parameter in the setup form can be used to inject PHP code that gets written to `Include/Config.php`, which is then executed on every page load. This is more severe than typical authenticated RCE vulnerabilities because it requires no credentials and affects the installation process that administrators must complete. Version 5.21.0 patches the issue.
How severe is CVE-2025-62521?: CVE-2025-62521 has a CVSS 3.x base score of 10.0, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-62521 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-62521?: CVE-2025-62521 affects Churchcrm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-62521?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-62521 have an EU (EUVD) identifier?: Yes. CVE-2025-62521 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203917.
When was CVE-2025-62521 published?: CVE-2025-62521 was published on 2025-12-17 and last updated on 2026-06-17.

References

https://github.com/ChurchCRM/CRM/security/advisories/GHSA-m8jq-j3p9-2xf3

Affected products (1)

cpe:2.3:a:churchcrm:churchcrm:*:*:*:*:*:*:*:*

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